Dental appliance.



C. W. DAVISON.

DENTAL APPLIANCE.

APPLICATION FILED 111111.13, 1911.

1,001,362. Patented Aug. 22, 1911.

W WWJKMA/ZWEMW I COLUMBIA I'LANUUIIAPH cm, WASHINGTON, l). c.

CHARLES W. IDAVISON, OF JEFFERSON CITY, MISSOURI.

DENTAL APPLIANCE.

it comes.

Specification of Letters Patent.

Application filed March 13, 1911.

. Extented Aug. 22, 1911.

Serial No. 614,202.

To all whom it may concern:

Be it known that it, CHARLES \"V. Dawson,- a citizen ot the UnitedStates, residing at Jeti'crson City, in the county of Cole and State oilMissouri, have invented certain new and usetul lmprovemcnts in DentalAppliances; and i. do hereby declare the :tiollowing to be a lull,clear, and exact description of the invention, such as will enableothers skilled in the art to which it ap nxrtains to make and use thesame.

This invention relates to dental appliances and has for its object toproduce an apparatus that may be attached to a dental chair andconnected to a source of air supply under pressure, for keeping a thinblast of air flowing between the face oli an operator and that of hispatient, :for the purpose of preventing each from inhaling the othersbreath.

To these ends the invention consists in the novel details ofconstruction and combinations oil parts more fully hereinafterdescribed, and particularly pointed out in the claims.

Referring); to the accompanying drawings forming a part of thisspecification in which like numerals designate like parts in all theviews l igure 1 is a perspective view ot a portion of a dental chairwith a patient seated therein, and showing; my invention applied to thehead-rest and connected to a source of air supply; Fig. 9 is a plan Viewof my device, detached from the chair; Fig. 3 is an enlarged detaillongitudinal sectional view taken on the line 3-45 of Fig. 2; Fig. 4t isan enlarged cross sectional View taken on the line 4- 1: of Fig. 53;Fig. 5 is a View of a modified form of nozzle; Fig. 6 is a view ofanother modified form of nozzle; and Fig. 7 is a view at a nozzle thatis used for supplying; air to the cavity of a patients tooth to keep itdry while being filled.

1 indicates the back of a dental chair provided. with the usual.head-rest 2 to which is attachmh to the arm 3, my improved dentalapparatus 4 This apparatus consists of an arm 5 provided at one end witha collar (3 held in any adjusted position on the arm 3 by the set screw7. The other end of this arm is provided with a collar 8 which rigidlyholds screwed therein a small cylinder 9, while 10 indicates a set screwfor preventing the cylinder 9 from working, loose. A rod 11 carrying onone end a piston 12 is adapted to operate within the cylinder and beheld in an extended position by the spring); .123 located between theend o't said cylinder and said piston.

TH: indicates a head piece provided with a pad 15 and a collar lti whichcollar is held by a set screw 17 on the other end oi. the rod '11. Thisrod is also provided with a stop 18 adapted to be adjusted along thescrew threaded portion 19, to limit the movement of the optnating parts.

The cylinder 9 is reduced on its outer end. to provide a bearing; 20 toran arm 91 which arm is tulcrumcd as at and has attached thereto an airtube 23 which tube may be made of a flexible metal, and may be providedwith a valve fi-l. Said air tube is preferably of the shape shown; isadapted to extend, when in use, alone the side of a patients taco, andis 'n'ovided at its trout end with a nozzle 25. At its rear end it isturthcr connected to a hose 26 which leads to a source of compressed airsupply 27. lfivotally connected to the outer end of the arm 2i is a rod28 which is pivotally connected to a stud 99 screwed into the piston'12, as clearly shown in Fin. 4. Plaid stud is adapted to travel in theslot 30 in the side of the cylinder 9 when the head piece H- isoperated.

The device when not in use. is normally held by the spriny' '13 in theposition shown by Full lines in his. 9. When the patients head comesinto contact with the head piece H the air pipe 2 is caused to swingupward and inward to the position shown in Fig. 1. its flexibilitypermits the tube now to be adjusted to the proper position so that ablast of air will not touch the patients taco, but will at the same timeprevent the operator and patient lroin inhaling each others breath.

On account of the flexibility of the air tube and the. variousadjustments, the device is capable ol delivering a blast of air, fromany desired position. in front of a patients :tace. Also of course, anysuitable Form of automatic valve may be employed instead ot the valve 94and the device may he used tor various other kinds of operationsl'orinstance. in shaving. massaging. etc.

The dillerent nozzles as shown in Figs. 5 and 6 may be secured to theend of the air pipe to suit dill'erent requirements.

in the modification shown in Fig. 7. the nozzle 31. is made relativelylong and flexible so that when it is secured to the end of l. l. t)

the air tube it may be used for insertion into a patients mouth forsupplying air to the cavity of a tooth to keep it dry while filling.

From the foregoing, it may be seen that if the above device is used, theoffensive odor arising from a decayed tooth or a foul stomach of aperson cannot reach the operator.

It is obvious that those skilled in the art may vary the details ofconstruction and arrangement of parts without departing from the spiritof my invention, and therefore, I do not .wish to be limited to suchfeatures except as may be required by the claims.

What I claim is 1. In an apparatus of the character described thecombination of a chair adapted to support a patient to be operated on;an adjustable spring actuated means connected to said chair comprising atube and a piston in said tube adapted to deliver a fiat blast of airbetween the face of said patient and the face of the operator, andthereby prevent each from inhaling the others breath, substantially asdescribed.

In an apparatus of the character described the combination of a chairadapted to support a patient to be operated on; an adjustable springactuated means connected to said chair comprising a tube adapted todeliver a flat blast of air between the face of said patient and theface of the operator; andmeans connected to said tube adapted to beoperated by said patients head for throwing said tube into and out ofoperative position, substantially as described.

3. In an apparatus of the character described the combination of a chairadapted to support a patient to be operated on; adjustable meansconnected to said chair comprising a tube adapted to deliver a flatblast of air between the face of said patient and the face of theoperator; and a spring actuated rod connected to said tube adapted to beoperated by said patient for throwing said tube into and out ofoperative position, substantially as described.

4. In an apparatus of the character described the combination of achair, provided with a head-rest, and adapted to support a patient to beoperated on; means connected to said head-rest comprising an arm; acylinder mounted on said arm; a tube connected to said cylinder adaptedto deliver a blast of air between the face of said patient and the faceof the operator; and a spring actuated rod mounted within said cylinderadapted to be operated by said patient for throwing said tube into andout of operative position, substantially as described.

5. In an apparatus of the character described the combination of achair, provided with a. head-rest and adapted to supporta patient to beoperated on; adjustable means connected to said head-rest comprising anarm; a cylinder mounted on said arm; a lever pivotally connected to saidcylinder; a tube mounted on said lever; a spring actuated piston mountedwithin said cylinder; a rod connecting said lever and said piston; and ameans connected to said tube adapted to deliver a blast of air betweenthe face of the patient and the face of the operator, sub stantially asdescribed.

6. In an apparatus of the character described the combination of asupport adapted to hold a patient to be operated on; an adjustable sprinactuated means connected to said support comprising a bent flexibletube; a flexible nozzle mounted on one end of said tube; a means adaptedto be operated by the patients head for throwing said tube into and outof operative position; and a means connected to said tube for deliveringa blastof air thereto, substantially as described.

In testimony whereof, I afliX my signature, in presence of twowitnesses.

CHARLES W. DAVISUN.

Witnesses:

E. ARTHUR Veer, BALTHASAR LOETHEN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

